VMS Help AUTOGEN, Phases, SHUTDOWN  *Conan The Librarian (sorry for the slow response - running on an old VAX)

    SHUTDOWN shuts down the system and awaits a manual reboot. To
    use the new system parameter values generated in the SETPARAMS
    phase, specify either SHUTDOWN or REBOOT as the end phase. You
    can define the logical name AGEN$SHUTDOWN_TIME (using the DCL
    command DEFINE) to specify the number of minutes before shutdown
    occurs.

    SHUTDOWN requires the SETPRV privilege.